Fuse-plug



E. C. WEISGERBER.

FUSE PLUG.

APPLICATION FILED "8.19. ms.

Patented July 13, 1920.

10 cgvwenkoz -(W royalty UNITED STATES PATENT OFFICE.

EDWIN C. WEISGERBER, OF THE UNITED STATES ARMY.

FUSE-PLUG.

Specification of Letters Patent.

Application filed February 19, 1919.

Patented J uly 13, 1920.

Serial No. 277,980.

To all whom it may concern:

Be it knownthat I, EDWIN C. \Vnrscnannu,

Capt. corps of engineers, a citizen of the United States, stationed at \Vaslnngton,

have invented an Im- District of Columbia,

of which the folprovement in Fuse-Plugs, lowing is a. specification.

T he invention described herein may be used by the Government, or any of its officers or employees in prosecution of work for the Government, or by any other person in the United States, without payment of any thereon.

My invention relates to improvements in fuse plugs, and refers particularly to what are commonly known as refillable fuse plugs, used in connection with electric-lighting systems, although they are not necessarily limited to such service.

One object of my invention is the provision of a refillable fuse plug which will allow instant application and removal of the fuse-strip or conductor from the exterior of the fuse proper, without interfering with the parts of the plug, thus permitting the renewal of the fuse-strip when found necessary with ease and facility and at the same time saving the main parts which constitute the fuse plug as a whole.

Another bject of my invention is the provision of a refillable fuse plug which will permit exterior access to the fuse strip or conductor and which will locate or dispose the constituent elements of the plug in the most compact and satisfactory relation to secure the best possible results.

Another object of my invention is a provision of a refillable fuse plug which will possess merit in point of simplicity, will be inexpensive of production and which will prove absolutely reliable and practical in every particular.

ith the attainment of the stated objects in view. the invention consists broadly of a fuse plug, comprising a hollow procelain or nsulatinp body. a fuse-strip or conductor disposed within the hollow body and having its terminals passing substantially to the cx terior of the body. and exteriorly accessible means for securing the terminals in proper electrical contact relation.

The invention further consists of a refillable fuse plug, embodying certain features of construction. combination and arrangement of parts for service, substantially as shown, described and particularly defined by the claims, the right being reserved to make any change or modification which falls within the spirit of the invention as distinguished by the claims.

In order that the details of construction and the operation of my refillable fuse plug may be readily understood and the advantages accruing from such construction be fully appreciated, l have shown in the ac' companying drawing a fuse plug or condurtor cmistructcd according to my invcn tion.

Figure 1 represents a side. elevation of a refillable fuse plug embodying my improvements;

Fig. 2 represents a central vertical sec.- tlonal view thereof;

lig. 3 represents a bottom plan view of the improvement. the clamp disk removed;

Fig. 4 represents a sectional view taken on the line 44 of Fig. 2: and

Fig. represents a plan view of the blank forming: the fuse-strip or conductor em ploycd in my refillable fuse plug.

The fuse plug in general appearance is not essentially different from fuse plugs of this chara ter in general use and comprises a. hollow porcelain or insulating: body coniposed of the shouldered base portion A. the

intermediate portion B, and the conical redu ed portion C. the said reduced portion being! open and provided with an internal rib D, and a pair of oppositely disposed seats or re esses E, whose function or purpose will presently appear. while. the exterior of the intermediate portion of the insulating body is provided with threads F, to receive the hreaded metal shell conductor G. said enlarged base portion A. of the body being provided with the usual transparent or mica window or covering H, retained in place by the cap H. The ca p H has a close binding fit on the body of the plug or may be so cured thereon in any usual and well known manner.

Fitting in the opening of the restricted portion (ljof the hollow insulating body is a metal disk -l. formed with the pair of lips K. which seats in the recesses E. and is further provided with an opening L, for the passage of the fuse strip or conductor. and has formed thereon the threaded stem M. which receives the disk N. and also the threaded clamping disk 0, between which andthe disk is clamped one terminal P, of the fuse strip or conductor 1", while the other terminal '1 zof said conductor, passes through an opening Q, in the body and is clamped between the conductor shell (i, and the threaded bushing ll, mounted in a socket .R", in the bod-y, While theclamping screw S, serves to hold the terminal P, of the fuse strip or conductor in operative relation to the shell and bushing.

It will thus be apparent that the fuse-strip ODCQHtlUCtOI is disposod within the hollow insulating bodywithits terminals disposed .in such anannerithut the removal of the clamping screw and the clampin 'disk and unscrewing the screws and shell 5% will perimlt-tl1e instant detachment of a worn fuse stripor conductor and allow ithe immediate replacement of a new fuse strip or conductor without interference or injury to any part of the fuse plug, and also that the construetion disposes the elements which compose the iusefi nvthe most practical relation to secure the best possible results, and that gcnerally'the improvements will =insure the production ofurn effieient, desirable, and entirely practical commercial produrt of this eha racter. It -will bemnderstoodthat a new fuse P may be easily threaded through the opening 1L :andinto the opening Q and the remoyed parts ireplaeedp 1. A refillable fusep'lug, consisting of a hollow,insulatingbody formed with an openingin'one end and an opening intone wall in alil ied'relation', a conducting shell carried by said insulating body and having a passage therein, a clamping member mounted in the conducting shell and body, anda ifiuse-strip or conductor having its termina'lsohrmped in operative position bythe ounducting shell,and clamping member and :bytheielamping memhervmounted in the end Eof said body. r

2. A refillable fuse pl'ug, consisting of a hollowinsulating body havingan open, end and ha-vinguin opening in one side thereof, a shelleontluotor on said body disposed irela 'tiveliy to the opening in the side thereof a clamping member mounted in the openend of-the-rbody, and a fusestrip or conductor having one terminal seeur ed by said clamping member in the open end of the body and the other pa ssing through the opening in the wall of the body and retained by the said shell conductor.

3. A refillable fuse plug, consisting of a hollow insulating body having an'mjiening in one wall and provided with an open end, a conductor shell mounted intermediately upon the body, a threaded, bushing fitting in the body, a binding screw having its threaded portion passing through'ztheliconductor she'll into said threaded bushing, a clamping member mounted in the open end of the body and provided with an opening,

and a fuse-strip or eonduotor arranged in the 'hollow vbody and havingits terminals one secured by the clamping member and its other between the bushing and .shell bysaid binding screw.

a. A refillable fuse plug, consisting of: a w

hollow insulating body having a passage in one wall and having 3111 open end Iformed with recesses, a disk fitting the open end and having lips fitted ;in said recesses, "having a passage therethrough and formed with a threaded stem, a clamping member engagrin gsaid threaded stem, a conductor shell mounted upon the body, a threaded bushing in the body eonti uous:to the passagedn the wa'll thereof, 3.1; inding screw. in-said i bushing, and a -fuse-strip or conductor disposed in the hollow body with its terminals passing through the passage in'the wall and disk, andisecured in roper conducting r'ela tion'by means-of sai clamping member and binding screw.' 3 i i 5. In a refillable fuse, the combination with a hollow, insulating body, having a passagoin one'end and inone walha clamping elementrigidly mountedinthe open end i of said body, a: conducting shell and binding screw mounted exteriorly of the body, anda fuse-stripfor conductor disposed Within the body and having its terminals one passingwhrough 'the clamp and securedthereby and its other terminal passing through the opening -in the wall of the bod? and seeuredby the conductorshell andbind- 100 EDWIN o; WEISGERBER.

'ing screw.' 

